Brake shoe



Sept. 1. 1931.

A. NELSON BRAKE SHOE Filed June 9, 1930 .z m l iflm N E wh- HT@H'|IIH{/0 LT Q inis]! J W? Patented Sept. 1, 1931 UNITED STATES PATENT; OFFICEALBERT NELSON, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO AMERICAN BRAKE SHOEAND FOUNDRYOOMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF DELA-\VARE BRAKE snon Application filed June 9, 1930. Serial No. 460,037.

This invention relates to railway brake shoes of the center-fasteningtype and it has for its object to provide a solid substantialconstruction for the attaching lug and the back at the base of the lug-I haveillustrated the invention in a flanged driver type of brake shoeand referring to the drawings Fig. 1 is a plan view of the reenforceback.

Fig. 2 is an edge view of the back partly in section.

Fig. 3 is a transverse sectional view of a shoe on the line 83 of Fig.1.

Fig.4 is a transversesectional view of a shoe on the line 44 of Fig. 1.

Fig. 5 is a fragmentary sectional view of the reenforce back.

Fig. 6 is a detail perspective view of the lug strap.

Referring to the drawings the reenforce back 7 is embedded in the backof the body 8 during the casting operation and it is provided withopenings 9 and recesses 10 to make anchoring engagement with the body. A

2 plurality of spaced lugs llare struck up from the body in pairsextending transversely of the body in substantially parallel relation.By striking up the lugs 11 openings 12 are left in the body separated bycrossed bridges 13, 13 integral with the back. The lug strap 14 isformed from a strip of metal and bent to shape having depending legs 15provided with angular feet 16. The feet 16 and the lower part of thelegs 15 are provided with slots 17.The legs are also provided withshoulders 18. The feet are not formed on the legs until after the lug isassembled with the back. The slotted legs are inserted in the openings12- and the shoulders 18 are engaged with the top of the lugs 11, afterwhich the feet are bent to interlockingly engage the back. The slots 17engage the bridge 13 and the upper ends of the slots rest upon thisbridge. The lug strap is'thus rigidly supported on the support lugs 11so that shocks, jars and blows applied to the lug will be transmittedthrough the support lugs to a considerable area of the back. The lugstrap is interlockingly engaged with the back and its bridge 13 to holdthe strap rigidly in fixed position. When the body is cast on the backthe body metal will run through the openings 12 and fill the spacebetween the support lugs of each transverse pair and partly fill the lugstrap at 19 to form a solid attaching lug construction which will resistthe stresses and strains, shocks and jars to which an attaching lug issubjected in service.

I have shown the invention in a flanged driver type of brake shoe but itmay be adapted to other shoes and I reserve the right to make anychanges that may be necessary or desirable for adapting the invention toother types of shoes or for other purposes within the scope of thefollowing claims:

I claim:

1. A brake shoe comprising a body having a reenforce back embeddedtherein, spaced support lugs struck up from the back in pairs extendingtransversely of the back and leaving openings in the back, and a lugstrap having parts projecting through said openings and engaged with theunder side of the back and also having shoulders engaged with said lugs.

2. A brake shoe comprising a body having a reenforce back embeddedtherein, spaced support lugs struck up from the back in pairs extendingtransversely of the back and leaving openings in the back separated bycrossed bridges, and a lug strap having parts projecting through saidopenings and engaged with the under side of the back and also havingshoulders engaged with said lugs.

3. A brake shoe comprising a body having a reenforce back embeddedtherein, spaced support lugs struck up from the back in pairs extendingtransversely of the back and leaving openings in the back separated bycrossed bridges, and a lug strap having slotted legs engaged with saidopenings and straddling one of said brides, and having feetinterlockingly engaging the back, and shoulders on said lug strapengaging said support lugs.

4. A brake shoe comprising a body having a reenforce back embeddedtherein, spaced support lugs struck up from the back in pairs extendingtransversely of the back and leaving openings in the back separated bycrossed bridges, and a lug strap having slotted legs engaged With saidopenings and straddling one of said bridges, and having feetinterlockingly engaging the back, and shoulders on said lug strapengaging said support lugs, the body metal running through the openingsduring the casting operation and filling the space between the supportlugs of each pair and partly filling the lugstrap. a v ALBERT NELSON.

